I am 17 and think I could possibly be pregnant. I had my period May 10th and then had unprotected sex May 31. I got my period a week later on June 10th and I thought I was in the clear. I am now late for my next period. I am now 6 days late and no sign of it coming. I have had headaches everyday for the past 2 weeks and the day before my expected period day I had a thick, white, stringy discharge. The next day I had a clear stringy discharge. I have had on and off cramping but its been very mild. Nothing like period cramps. I also started feeling nauseous this morning and off and on all day. I feel a little bloated and my breasts are just a little tender but nothing major at all. Is there any way I could be pregnant even though I had a period a week after sex?

Possible but not likely, sounds more like STD or infection, and you should have that checked.

Also too early for many "signs" if you are just one week late. Most signs would not happen for another month or so.